It is easy for me to understand the logic of leading a low card in most situations such as from a sequence such as: Q 7 3 - where leading the 3 may encourage a return the suit as well as leading the high card in a sequence such as: J 10 9 as well as going High-Low - with a doubleton - such as with: 9 4 - leading the 9 (all assuming that this is the best suit to lead.) It is Not clear to me why MUD - is "out-of-date" and why leading from a sequence such as: 9 7 3 - it is common to lead the 3. I can understand - if leads are 3rd or 5th highest that the leading of the low card may show an odd number of cards in the suit. At the same time - IF I had the 3 - lead as in the 9 7 3 sequence and I took the trick, I might well lead the suit back to my partner, often expecting that partner might have an honor in the suit. What are the primary reasons to lead the Low card - from a 3 card sequence - regardless of the presence or lack thereof of an honor in the suit? Is it different in a NT vs. suit contract? If one is to lead the low card - is this more sensible with 3rd/5th leads vs. 4th leads? (No doubt this has been discussed previously - sorry about this.) Thanks!
